(0.1+0.12+0.123+0.1234)*(0.12+0.123+0.1234+0.12345)-(0.1+0.1

(0.1+0.12+0.123+0.1234)*(0.12+0.123+0.1234+0.12345)-(0.1+0.1 计算（0.1+0.12+0.123+0.1234）×（0.12+0.123+0.1234+0.12345）-（0.1+0 跪拜计算方法：0.1+0.12+0.123+0.1234+.+0.123456789=? 0.1+0.12+0.123+0.1234+.+0.123456789=?此题为简算题. （0.1【1的循环】*0.5625）/（0.123【三的循环】+19/150） 0.12*20+(x-20)0.09=0.1x 解方程 0.1+0.2+0.3+...+0.8+0.9+0.12+0.14+0.16+...+0.88 0.1+0.2+0.3+...+0.8+0.9+0.12+0.14+0.16+...+0.88 = 把0.123、0.213、0.312、0.132、0.321、0.32、0.23、0.31、0.13、0.21、0.12 求下面算式的和:0.1+0.2+0.3+...+0.8+0.9+0.12+0.14+0.16+...+0.98 计算0.1+0.2+0.3+···+0.9+0.10+0.11+0.12+0.13+···+0.99 解方程 20乘0.12+0.03（x-20）=0.1x